Truck side frame



Aug.5, 1924. 1,503,491

H. E. DOERR TRUCK sms FRAME Filed Oct. 9, 1922 Patented Aug. 5, 1924..

HARRY E. DOERR, or sr. LOUIS, MIssoUnI, ASSIGNOR To soULLIn srnnLco, or

sr; LOUIS, mssocnr, A coaroanrron or nrssoom,

TRUCK SIDE FRAME.

Application filed October 9, 1922. Serial No. 593,225.

To all whom it may concern:

Be it known that I, HARRY E. DOERR, a citizen of the United States, residing at St. Louis, State of Missouri, have invented certain new and useful Improvements in a Truck Side Frame, of which the following is a specification. V

This invention relates to a truck side frame.

One objectof the invention is to provide an economical truck side frame of an integrally formed type which is simple and durable in construction, and in which when cooled in the mold, the strains will be equally distributed between the top and bottom members.

Another object is to provide a side frame journal box in which all tendency for the development of cracks at the junction of the walls and the wedge lugs, due to shrinkage conditions, is overcome.

These and other objects are accomplished by means of the arrangement disclosed on the accompanying sheet of drawings, in Which Figure l is a side elevation of a truck side frame embodying my invention; and

Figure 2 is a top plan view thereof.

The various novel features of the invention will be apparent from the following description and drawings, and will be particularly pointed out in the appended claims.

Referring to the figures of the drawings, it will be noted that the side frame includes an upper member 10, a lower 1nem ber 11, bolster columns 12 and journal boxes 13 all cast in a single piece or integrally.

It will be noted that the journal boxes 13 are arranged approximately centrally between the upper and lower frame members 10 and 11, or, in other words, substantially vertically centrally of the frame. The web 14 of the upper frame member 10 joins the top of the journal box at the point 15 in the vertical center line of the journal box and the web 16 of the lower member 11 joins the bottom of the journal box at the point 17 in the same vertical center line. As a result of so positioning the journal boxes centrally between the upper and lower members of the side frame and joining the parts as described, the strains incident to cooling of the side frame in the mold are equally distributed between the upper and lower side frame members 10 and 11. Accordingly, development of cracks due to unequal distribution of strains incident to the cooling of the metal in the mold is overcome.

It will be noted that this side frame, strictly speaking, is not in the form of a truss, as is customary, for the reason that the upper and lower members 10 and 11 respectively, do not join the journal boxes at substantially a common point. In my present arrangement if the journal boxes were to be entirely removed and vertical members were provided for connecting the extreme outer ends of the upper and lower side frame members, the frame would be substantially a pantograph, for the reason that if loaded, as is customary with side frames, the top member would not be in compression and neither would the bottom member be .in tension, but each would act as a cantilever. For this reason the channel-shaped upper and lower side frame members 10 and 11 are braced or provided with strengthening walls 18. to give a box section to the side frame members at such braced points, to resist compound strains which are developed.

Also to avoid development of cracks at the junction of the walls 19 and wedge lugs 20 of the journal box, due to uneven cooling in the mold, the wedge lugs 20 are made of the same thickness throughout as the side walls 19 of the journal box. In this particular instance .it will be noted that the side walls 19 of the journal box merge into the wedge lugs or, in other words, the side walls 19 of the journal box are depressed to form wedge lugs 20.

It is my intention to cover all modification of the invention falling within the spirit and scope. of thefollowing claims.

I claim:

1. A side frame including upper and lower members and journal boxes all cast integrally, said upper and lower members respectively joining said journal box at the upper and lower points thereof along the transverse vertical center line whereby strains incident to cooling in the mold will be equally distributed between said upper and lower members.

2. A side frame including upper and lower members and journal boxes all cast integrally, said upper and lower members versely of the frame and respectively joining said journal boxes at upper and lower points thereof along the transversercenter line whereby strains incidentv to cooling in the mold will be equally distributed be" tween said upper and lower members. i

A side frame including upper and lower members and journal boxes all cast integrally, said journal boxes being arranged midway between said upper and lower members, and said upper and lower members being connected to said journal boxes at upper and lower points along the transverse vertical center line of the latter whereby strains incident to cooling in the mold will be equally distributed between said upper and lower members.

e. A side "frame including upper and lower members and ournal boxes all cast integrally, said upper and lower members having webs respectively joining said journal boxes at upper and lower points thereof whereby strains incident to cooling in the mold will be equally distributed between said upper and lower members, said journal boxes having depressed portions forming wedge lugs of the same thickness as the walls of the boxes to prevent cracking at their junction due to uneven cooling in the mold.

Signed at St. Louis, Missouri, this 5th day of October, 1922.

HARRY E. DOERR. 

